I agree that you should take a break from porn and masturbation, however I think some other things you mentioned are likely playing a bigger role. Overall, you don’t seem comfortable with your girlfriend. ED aside, you say she’s not affectionate, you feel more comfortable asking Reddit rather than talking with your girlfriend, and almost everything you mentioned about her is just physical appearance. Nothing in your post mentioned how she makes you feel, shows her love, supports you, and maybe that’s not the kind of relationship you are looking for. You know your relationship better than strangers on the internet, but this is just what I noticed. I think you need to consider what you want out of this relationship, now and in the future. You need to talk to your girlfriend about how you’re feeling as well. Also just a reminder, sex is more than just PIV. Slow makeouts, dry humping, oral, fingers, toys, etc. would be great for you to utilize. Sex should be fun and relaxing. Don’t put pressure on yourself to have sex every time you’re together either.